WO2015161686A1 - Variable-pressure jet-propulsion air engine - Google Patents

Abstract

Disclosed is a variable-pressure jet-propulsion air engine, comprising an impeller chamber (11) and an impeller (12), wherein injection holes (111) for injecting compressed gas and exhaust holes (112) for exhausting the compressed gas are formed in the impeller chamber, the impeller is assembled in the impeller chamber via a rotating shaft (121), the impeller comprises impeller teeth (122) which are equally arranged along a rotational circumferential surface, the rotational circumferential surface of the impeller is in air gap fit with an inner surface of the impeller chamber, variable-pressure jetting grooves (113) are further arranged in the inner surface of the impeller chamber, the distance between the variable-pressure jetting grooves and the adjacent injection holes in the rotating direction of the impeller is larger than a tooth spacing, and when the tooth end of a certain impeller tooth rotates to the position of the variable-pressure jetting groove, two working chambers in front and rear of the impeller tooth are in communication with each other via the variable-pressure jetting groove. By means of providing the variable-pressure jetting grooves, gas injected from the injection holes can do work again before the gas is exhausted from the exhaust holes and the energy efficiency and the power of the engine can be improved.

Description

 Variable pressure jet air engine Technical field

 The present invention relates to the field of mechanical technology, and in particular to a variable pressure jet air engine.

Background technique

An engine that uses fuel as an energy source consumes a large amount of fuel and emits a large amount of exhaust gas, polluting the environment.

In order to protect the global environment, the applicant of the present invention has proposed a series of inventions and creations on the blast engine and the motor vehicle, including, on December 12, 2007, the publication number is CN101087946A, and the name is "the wind engine is the wind power. Chinese patent for replacing the engine of fuel energy with air pressure; the publication date is October 7, 2009, the publication number is CN101550915A, the Chinese patent entitled "Fengqi Engine and Motor Vehicle"; the publication date is December 28, 2011, announced No. CN102296990A, the Chinese patent application entitled "Improved Compressed Gas Engine". These blast engines have at least one impeller chamber, an impeller housed within the impeller chamber, and a jet system for injecting compressed gas into the impeller chamber.

When in use, these ventilated engines can be installed on a power-driven power machine, using compressed gas as the main power, no fuel consumption, no exhaust gas, hot gas emissions, and no pollution. It is valuable to further improve the energy efficiency and power of air engines.

Summary of the invention

According to the present invention, a variable pressure jet air engine includes an impeller chamber and an impeller. The impeller chamber is provided with a spray hole for injecting compressed gas and a discharge hole for discharging compressed gas, and the impeller is installed in the impeller chamber through a rotating shaft. The impeller includes a blade tooth which is equally divided along the rotating circumferential surface, and the rotating circumferential surface of the impeller cooperates with the air gap of the inner surface of the impeller chamber, and the inner surface of the impeller chamber is further provided with a variable pressure air-jet groove, and the air-jet groove is transformed along the rotation direction of the impeller The distance from the adjacent injection holes is greater than a tooth pitch, and the tooth pitch is the distance between two adjacent blade teeth. When the tooth end of a blade tooth rotates to the position of the pressure-changing air groove, the Two working chambers before and after the teeth are connected through the pressure-changing jet.

According to the variable-pressure jet air engine of the present invention, by providing a variable pressure air-jet groove, when the blade teeth are rotated to the position of the air-jet groove, the two working chambers before and after the blade teeth are connected, so that the compressed airflow is from the working chamber with high pressure. (The working chamber closer to the injection hole) is branched to the working chamber with low pressure (working chamber farther from the injection hole), thereby pushing the impeller to rotate, so that the gas injected from the injection hole is sprayed from the discharge hole The work can be done again before going out. In actual use, the speed of the impeller can be increased, thereby improving the energy efficiency and power of the engine.

Specific examples of the present invention will be described in detail below with reference to the accompanying drawings.

DRAWINGS

Figure 1 is a schematic radial cross-sectional view of the engine of Embodiment 1;

Figure 2 is a schematic axial sectional view of the engine of Embodiment 1;

Figure 3 is a schematic radial cross-sectional view of an upper portion of the engine of Embodiment 2;

Figure 4 is a schematic radial cross-sectional view of the middle portion of the engine of Embodiment 2;

Figure 5 is a schematic radial cross-sectional view of a lower portion of the engine of Embodiment 2;

Fig. 6 is a schematic axial sectional view of the engine of the second embodiment.

detailed description

Example 1

One embodiment of a variable pressure jet air engine in accordance with the present invention can be seen with reference to Figures 1 and 2, including an impeller chamber 11 and an impeller 12.

The impeller chamber 11 is provided with a discharge hole 111 into which compressed gas is injected and a discharge hole 112 through which compressed gas is discharged. Generally, the injection hole and the discharge hole may be arranged in pairs. In the rotation direction of the impeller, before the injection hole is arranged in the discharge hole, the compressed air flow is injected from the injection hole, the impeller is rotated, and then the discharge hole is ejected. There are two or more injection holes and discharge holes, which are equally disposed on the inner surface of the impeller chamber in the direction of rotation of the impeller. For example, in this embodiment, three injection holes and discharge holes may be respectively provided. In order to make the overall force of the impeller uniform, one injection hole can be embodied as multiple openings uniformly arranged in the axial direction. For example, one of the parts shown in FIG. 1 is located at the upper part of the impeller, one is located in the middle of the impeller, and one is located in the lower part of the impeller. In the above, the plurality of intake openings that are simultaneously connected to one working chamber are collectively referred to as "one injection hole".

The impeller 12 is mounted on the impeller chamber through a rotating shaft 121. The impeller includes blade teeth 122 which are equally divided along the rotating circumferential surface of the impeller, and the rotating circumferential surface of the impeller cooperates with the inner surface air gap of the impeller chamber.

The inner surface of the impeller chamber is further provided with a pressure-changing gas jet groove 113. The distance between the pressure-changing gas-jet groove and the adjacent injection hole in the rotation direction of the impeller is greater than one tooth pitch, and the tooth pitch is called two adjacent leaf teeth. The distance between when the tooth end of a certain blade tooth rotates to the position of the pressure-changing air-jet groove, two working chambers located before and behind the blade tooth communicate with each other through the pressure-changing air-jet groove. The variable pressure air jet groove may be disposed in one-to-one correspondence with the injection hole, and may be in the shape of a groove extending axially on the inner surface of the impeller, as long as the working space of the front and rear of the blade teeth can be communicated when the blade teeth pass, of course It would be more preferred that the recessed shape would be more conducive to the flow of gas from a relatively high pressure working chamber into a relatively low pressure working chamber. Two or more variable pressure air jet grooves may be provided between a pair of injection holes and discharge holes. The distance between the variable pressure jet groove and the adjacent injection hole can be normally operated. In practical applications, an appropriate value can be selected according to the specific structure of the impeller and the injection hole and the discharge hole, for example, In the embodiment, the impeller has 15 blade teeth, and three uniformly distributed injection holes and discharge holes are provided, and the distance between the air injection groove and the injection hole has a good effect around the two tooth pitches.

In this embodiment, each of the injection holes can communicate with an external air source, and a high-pressure compressed gas is injected, and each of the discharge holes can be exhausted to the outside, and a variable pressure jet is disposed between the pair of injection holes and the discharge holes. The trough makes it possible to work again through the pressure-changing jet groove after one jet, and to increase the rotational speed of the impeller.

Example 2

An embodiment of a variable pressure jet air engine according to the present invention can be referred to FIGS. 3, 4, 5, and 6, including an impeller chamber 21 and an impeller 22. The main difference between this embodiment and the embodiment 1 is that it further includes two partitions 23 for dividing the impeller 22 into three stages in the axial direction. In other embodiments, more or fewer baffles may be provided to divide the impeller into different stages.

The partition plate 23 is disposed along the axial direction of the rotating shaft 221 of the impeller 22 such that the partition plate 23 is located on both sides of the blade teeth of each stage of the impeller, which together with the blade teeth enclose a working chamber.

The injection hole 211 and the discharge hole 212 are respectively provided at least one with respect to each stage of the impeller, and all the injection holes and the discharge holes are equally divided in the rotation direction of the impeller. In the present embodiment, the injection hole and the discharge hole are respectively provided with respect to each stage of the impeller, so that the injection hole and the discharge hole of the three-stage impeller are respectively at different positions on the rotating circumferential surface, see FIGS. 3, 4 and 5. The pressure-changing gas grooves 213 are respectively disposed on the inner surface of the impeller chamber with respect to the position of each stage of the impeller, so that the pressure-changing gas-jet grooves of the different stages of the impeller are at different positions of the rotating circumferential surface.

Since only one injection hole is provided for each stage of the impeller, more than two jet channels can be provided for better power. For example, in this embodiment, three jet grooves are provided for each stage of the impeller, and Effectively using the air jet groove to perform work again, the distance between the first pressure-changing air-jet groove of each stage and the injection hole and the distance between the subsequent pressure-changing air-jet grooves can be gradually reduced along the rotation direction of the impeller. For the impeller (15 teeth) used in this embodiment, the distance between the first air jet groove and the injection hole is preferably 4 to 5 tooth pitches, and the distance between the subsequent air jet grooves is 2 to 3 The tooth pitch is more preferred.

In this embodiment, the injection holes of each stage of the impeller are connected to an external air source, and the discharge holes of each stage of the impeller are exhausted to the outside. In this case, the impellers of each stage are in a parallel relationship, and are respectively injected from the outside. The airflow is driven and the gas is exhausted to the outside, and the plurality of air jets provided in each stage of the impeller effectively increase the energy efficiency of the injected gas.

Example 3

Another embodiment of the variable pressure jet air engine according to the present invention also includes an impeller chamber, an impeller and a partition, which differs from the embodiment 2 in the discharge hole of the upper stage impeller and the injection hole of the lower stage impeller. In communication, the injection hole of the first stage impeller communicates with the external air source, and the discharge hole of the last stage impeller is exhausted to the outside. In this case, it is equivalent to a series relationship between the impellers at all levels. The externally injected airflow enters the lower impeller and continues to work after the upper impeller works, and can more fully utilize the energy of the externally injected airflow. .

The above embodiments are intended to be illustrative of the principles and embodiments of the present invention. It is understood that the above embodiments are only intended to aid the understanding of the invention and are not to be construed as limiting. Variations to the above-described embodiments may be made in accordance with the teachings of the present invention.

Claims (6)

 A variable pressure jet air engine comprising: The impeller chamber (11, 21) is provided with injection holes (111, 211) for injecting compressed gas and discharge holes (112, 212) for discharging compressed gas; An impeller (12, 22) is mounted on the impeller chamber through a rotating shaft (121, 221), the impeller including a blade tooth (122), which is equally divided along a rotating circumferential surface of the impeller, and a rotating circumferential surface of the impeller Air gap matching of the inner surface of the impeller chamber; It is characterized in that The inner surface of the impeller chamber is further provided with a variable pressure air-jet groove (113, 213). The distance between the variable pressure air-jet groove and the adjacent injection hole is greater than a tooth pitch along the rotation direction of the impeller. a distance between adjacent two leaf teeth, when the tooth end of a leaf tooth rotates to a position of the pressure-changing air jet groove, two working chambers located before and behind the leaf tooth are connected through the pressure-changing air jet groove . The engine of claim 1 wherein: The injection hole (111) and the discharge hole (112) are two or more, and are equally disposed on the inner surface of the impeller chamber in the rotation direction of the impeller. The engine of claim 1 further comprising: a partition plate (23) disposed along an axial direction of the rotating shaft (221), the impeller is divided into several stages in the axial direction, and the partition plate is located on both sides of the blade teeth of each stage impeller, and is surrounded by the blade teeth Working chamber The injection hole (211) and the discharge hole (212) are respectively disposed at least one with respect to each stage of the impeller, and all the injection holes and the discharge holes are equally divided along the rotation direction of the impeller; The variable pressure jet grooves are respectively disposed on the inner surface of the impeller chamber with respect to the position of each stage of the impeller. The engine of claim 3 wherein: The injection hole and the discharge hole are respectively provided with respect to each stage of the impeller. In the axial direction of the rotation shaft, the discharge hole of the upper stage impeller communicates with the injection hole of the lower stage impeller, and the injection hole of the first stage impeller is connected. The external air source, the discharge hole of the last stage impeller, is exhausted to the outside. The engine of claim 3 wherein: The injection hole and the discharge hole are respectively provided with respect to each stage of the impeller, and the injection holes of each stage of the impeller are connected to an external air source, and the discharge holes of each stage of the impeller are exhausted to the outside. An engine according to any of claims 3-5, wherein There are two or more pressure-changing gas jet grooves, and the distance between the first pressure-changing gas-jet groove of each stage and the injection hole and the distance between the subsequent pressure-changing gas grooves gradually decrease along the rotation direction of the impeller.